Chronomat watch, 42 MM, Self-winding mechanical. Calibre Breitling B 01.1/4th second chronograph, 30-minute and 12-hour totalizers. Stainless Steel Case with Transparent sapphire crystal caseback. Approximately 70 hours power reserve. Vibrations 28,800 v.p.h with 47 jewels.Unidirectional, ratcheted. Screw-locked, two gaskets.Cambered sapphire crystal, glareproofed on both sides. Silver Dial -Stainless Steel Braclet.